There are 21 post offices under PIN code 110001.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Baroda House S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 2 | Bengali Market S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 3 | Bhagat Singh Market S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 4 | Connaught Place S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 5 | Constitution House S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 6 | Election Commission S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 7 | Janpath S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 8 | Krishi Bhawan S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 9 | Lady Harding Medical College S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 10 | North Avenue S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 11 | Parliament House S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 12 | Patiala House S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 13 | Pragati Maidan Camp S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 14 | Pragati Maidan S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 15 | Rail Bhawan S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 16 | Sansad Marg H.O | Head Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 17 | Sansadiya Soudh S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 18 | Secretariat North S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 19 | Shastri Bhawan S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 20 | Supreme Court S.O | Sub Office | Non-Delivery | New Delhi | Central Delhi | New Delhi Central | Delhi | Delhi | Delhi |
| 21 | New Delhi G.P.O. | Head Office | Delivery | New Delhi | New Delhi | New Delhi Gpo | Delhi | Delhi | Delhi |